Home / 13,136.92-18,129.05-7,168.64

Finding the Fourth Proportional to 13,136.92, 18,129.05 and 7,168.64

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Solution

The fourth proportional to 13,136.92, 18,129.05 and 7,168.64 is: 9,892.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.92 : 18,129.05 = 7,168.64 : x
  2. Step 2: Convert to fraction form
    13,136.92/18,129.05 = 7,168.64/x
  3. Step 3: Cross multiply
    13,136.92x = 18,129.05 × 7,168.64
  4. Step 4: Simplify right side
    13,136.92x = 129,960,533.39
  5. Step 5: Solve for x
    x = 129,960,533.39/13,136.92
  6. Step 6: Final answer
    x = 9,892.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.